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CMMG Mk4LE OR 300 BLK Upper Receiver Group

The CMMG Mk4LE OR 300 BLK Upper Receiver Group is chambered for the 300 AAC Blackout (7.62x35mm) cartridge. It features a 16, M300 profile, 4140 chrome-moly steel barrel. A salt bath nitrided finish is applied to the barrel inside and out for improv

PRICE: $649.99

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